CVE-2021-20094 json
A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a.
published 2021-06-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7551
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.7%
- EPSS 4.7% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to crash the CodeMeter Runtime Server.
Patch / fix
- wibu codemeter 7.21a
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-21-210-02 updated cvss 7.5
Wibu-Systems CodeMeter Runtime
-
Siemens PSS(R)CAPE CAPE_14_installations_installed_from_material_dated_earlier_than_2021-06-16affected: vendor fix, mitigation
-
Siemens SICAM 230affected: mitigation, no fix planned
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
cisa ICSA-23-320-03 updated cvss 7.5
Siemens Desigo CC product family
-
Siemens Desigo CC family V5.0 Siemens Desigo CC family V5.1 Siemens Desigo CC family V6 Siemens SENTRON powermanager >=V4.0affected: vendor fix
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
Exploit prediction
4.67% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- tenable.com https://www.tenable.com/security/research/tra-2021-24 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- n/a Wibu-Systems CodeMeter
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
tenable.com
/security/research/tra-2021-24
exploit, patch, third-party-advisory
-
cert-portal.siemens.com
/productcert/pdf/ssa-675303.pdf
patch, third-party-advisory
-
cdn.wibu.com
/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdf
mitigation, vendor-advisory
-
us-cert.cisa.gov
/ics/advisories/icsa-21-210-02
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2021-20094
- NVD CVE-2021-20094
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